Astudent tries out for the track team and runs a lap in 45 seconds. the coach tells her she will have to cut her time by 50% to make the team. how fast she run a lap to make the team? 9 seconds 22 1/2 seconds 25 seconds 44 1/2

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)